The red color of emission nebulae comes from the ________.
A) conversion of infrared light to visible light
B) conversion of ultraviolet light to visible light
C) energy emission of hydrogen
D) energy emission of helium
E) energy emission of oxygen
Correct Answer:
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Q13: The reason scientists believe the reflective bright
Q14: Fluorescence occurs when _.
A)visible light is converted
Q15: A red star is _ our Sun.
A)hotter
Q16: Why did Hubble think the Cepheid variables
Q17: When viewed through an optical telescope,planetary nebula
Q19: Fluorescence is a characteristic of _.
A)emission nebulae
B)dark
Q20: Cepheid Variables are stars whose brightness varies
Q21: What is the dominant factor in the
Q22: A star with the same color as
Q23: Degenerate matter can have densities 1 million
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